spectroscopy. The influence of the structural changes of the nanoclusters and the effect of the simultaneous presence of Lewis and Brönsted acid sites were evaluated studying the product distribution from the α-pinene oxide isomerization reaction. It was determined that the Brönsted acidity of the Fe/MCM-41 system has not the sufficient acid strength to modify the product distribution which is mainly governed
合成具有高
铁分散性的系统Fe 2 O 3 / MC
M-41,以将
路易斯酸位引入MC
M-41结构中。两种煅烧气氛(惰性和氧化剂)用于生产具有不同结构特性的
铁纳米团簇。此外,在两种固体上均实现了甲
硅烷基化处理,目的是中和与MC
M-41
硅烷醇基团相关的布朗斯台德酸度。通过原子吸收光谱,低角度X射线衍射,N 2吸附,程序升温还原,傅里叶变换红外光谱,29个核磁共振对样品进行表征Si和Mössbauer光谱。研究了α-pine烯氧化物异构化反应的产物分布,评估了纳米团簇的结构变化的影响以及路易斯和布朗斯台德酸位点同时存在的影响。已经确定,Fe / MC
M-41系统的布朗斯台德酸度没有足够的酸强度来改变主要由路易斯位点控制的产物分布。